Security explained
Keyless entry.
A separate check before starting.
Understanding the difference between unlocking a vehicle and authorising it to start is the first step towards better protection.
How relay theft works
On a vulnerable passive keyless entry and start system, thieves can relay communication between the vehicle and its genuine key. The car may behave as though the key is nearby, allowing entry and potentially starting even though the key remains with its owner.
Not every keyless vehicle has the same vulnerability. Factory security varies by model, year and technology.
Where DCPro Shield adds protection
DCPro Shield adds a separate authorisation step using its programmed Bluetooth tag. Accepting the vehicle’s factory key is not, on its own, the same as satisfying DCPro’s start authorisation.
In normal automatic mode, where the system remains armed and no authorised tag is recognised, DCPro maintains its start inhibition.
This adds a further barrier to an unauthorised start. The protection depends on a suitable installation, correct configuration and use of the system.
Other ways a vehicle may be targeted
Thieves may also use stolen keys, misuse diagnostic access or target a vehicle’s electronic network. These are different from a relay attack. Separate start authorisation can provide a further barrier where the installed immobilisation remains effective; this is not a claim of tested resistance to every method or vehicle-specific bypass.
What immobilisation does not cover
DCPro Shield does not prevent someone opening a door, taking belongings, damaging the vehicle or moving it by towing or lifting. It is an immobiliser, not a standalone alarm or GPS tracking service. No security product guarantees that a vehicle cannot be stolen.
Build protection in layers
- Keep factory keys and spares securely stored away from doors and windows.
- Use a suitable signal-blocking pouch for factory keys and check it still works.
- Keep your DCPro tag with you, separate from the vehicle keys where practical. Never leave an authorisation tag in the parked vehicle.
- Ask your installer to set an appropriate detection range and explain when the system rearms.
- Consider visible physical protection and a compatible tracker for complementary deterrence and recovery functions.
Read the independent guidance
These sources explain vehicle-theft risks and general prevention. They do not constitute testing, approval or endorsement of DCPro Shield.
Guidance reviewed 7 November 2026.